GB150737A - Improvements in or relating to illuminating devices - Google Patents
Improvements in or relating to illuminating devicesInfo
- Publication number
- GB150737A GB150737A GB25647/20A GB2564720A GB150737A GB 150737 A GB150737 A GB 150737A GB 25647/20 A GB25647/20 A GB 25647/20A GB 2564720 A GB2564720 A GB 2564720A GB 150737 A GB150737 A GB 150737A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- condenser
- annular
- revolution
- varied
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
- F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
150,737. Verain, L. F. Sept. 6, 1919, [Convention date]. Lighting, systems of.-In apparatus for illuminating operation tables, draughtmen's tables, metal chaser's and engraver's benches, &c., a light source a is arranged at the focus of an annular condenser b, and the zone' of light produced is reflected on to the table d &c. The reflecting- means may consist of a conical mirror c, several flat mirrors, or an annular mirror whose curvature in places containing the axis of revolution can be varied. The condenser b can be completed by a mirror g or by an optical device capable of transforming most of the light into the luminous beam. The Specification as open to inspection under Sect. 91 (3) (a) states that the curvature of the annular reflector can be varied in planes at rightangles to the axis of revolution and that the condenser may be replaced by a mirror or other optical device. This subject-matter does not appear in.the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR150737X | 1919-09-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB150737A true GB150737A (en) | 1921-09-29 |
Family
ID=8875688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25647/20A Expired GB150737A (en) | 1919-09-06 | 1920-09-06 | Improvements in or relating to illuminating devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB150737A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4315117A1 (en) * | 1993-05-07 | 1994-11-10 | Klose Abwassertech Gmbh | Equipment for the cleaning and treatment of waste water by means of electrolysis |
-
1920
- 1920-09-06 GB GB25647/20A patent/GB150737A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4315117A1 (en) * | 1993-05-07 | 1994-11-10 | Klose Abwassertech Gmbh | Equipment for the cleaning and treatment of waste water by means of electrolysis |
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